Relationship of DTI metrics to cognitive outcome measuresa
| DTI Measure | Correlation | Attention | Executive Function | Memory | Motor | Psychomotor/Processing Speed | Visuospatial | IQ |
|---|---|---|---|---|---|---|---|---|
| FA | Positive correlation | 11 | 9 | 14 | 4 | 5 | 4 | 2 |
| Negative correlation | 6 | 5 | 2 | 0 | 2 | 0 | 0 | |
| No correlation | 2 | 6 | 6 | 1 | 1 | 0 | 6 | |
| MD | Positive correlation | 3 | 2 | 2 | 0 | 0 | 1 | 0 |
| Negative correlation | 4 | 6 | 7 | 0 | 1 | 3 | 0 | |
| No correlation | 1 | 4 | 3 | 1 | 2 | 0 | 0 |
Note:—IQ indicates intelligence quotient.
↵a Total number of articles assessing relationships between DTI measures and cognitive outcomes. Cognitive-outcome measures have been categorized as 7 domains (top row). Articles are classified as reporting positive correlation, negative correlation, or no correlation. Positive correlation indicates a correlation coefficient greater than zero. Negative correlation indicates a correlation coefficient less than zero. No correlation includes articles that reported analyzing relationships between the DTI measures and cognitive outcomes within a domain but either reported finding no correlation (correlation coefficient equal to zero) or a correlation with a P value > .05. A fully referenced version of this Table is available in On-line Table 8.